豊後水道における表層水温場の変動特性 : (2) 1997 年の表層水温変動の特徴

概要

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We carried out sea surface temperature (SST) observations along a fixed line on the Bungo Channel, Japan in 1997 by using a commercial ferryboat. Then, we analyzed the SST data to investigate the characteristics of its variation. The results are as follows : 1) The SSTs in Saiki Bay were more lower than those in the other three sea areas of the middle and the eastern parts of the channel, and Sukumo Bay. 2) The SSTs in the whole channel were abruptly shifted to increase at the time of late February and mid-April, 1997. 3) The sudden increase of the SSTs happened with a period of about 10 days. 4) The SSTs near the cape were lower than those on its neighboring sea areas because of the vertical water mixing due to the strong tidal current. 5) The tidal front was formed in the mouth of Saiki Bay. 6) Generally speaking, the tidal front appeared in the bay mouth on March and disappeared on October.
1999-02-26